May 04, 1850

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Features

Improvement on the Shanks of Door Knobs

Directions for Preparing Talbotype Paper

Rules for Railway Travellers

Snead's Improved Grain Dryer

Bad Books

Strike on a British Railway

Medical Discovery

Works on Science and Art

Spiritual Knockings

Patent Information—Important to Persons Using Patented Machines

Mineral Cave in Wisconsin

Interior of East Florida

Georgia Turpentine

Correspondence of the Scientific American

Life of a Locomotive

Write Plain

Salt at Syracuse

Coal Saddle Theory—New Discovery

Death of a Sculptor

Antiquities of Ancient Chaldea

Shingling and Manufacturing Iron

On Tides

To Convert Iron into Steel by Cementation

English Cast Steel

Common Hardening

Welding Iron

Transatlantic Telegraph

Marine Night Signals

Improvement on Saddles

Cast Iron Sills

Cure for Smoky Chimneys

Balloons for the Arctic Expedition

Fire-Proof Paper

Abstract of some British Patents Recently Granted

Singular Clock

Navigating the Atmosphere

Useful Sleigh

Parker's Water Wheel

Consumption of Smoke

New Gunpowder—Caution

More about the Exibition of the Industry of all Nations

List of Patent Claims

Astronomical

Back Volumes Scientific American

Notice

Strange Event

History of Propellers and Steam Navigation

To Inventors and Mechanics

Antique Gold Mask

Late Eruption of Mount Vesuvius

Departments

From the Editor

To Correspondents

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Digital Issue ?Read or download this issue’s articles online. *A printed copy of this issue is not included. $7.99

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